It was formed in December 2017 as the parent company for Sumo Digital and Atomhawk, followed by its initial public offering on the London Stock Exchange later that month.

Carl Cavers, Paul Porter, Darren Mills and James North-Hearn, four former members of the defunct Infogrames Studios, established the developer Sumo Digital in 2003.

[2] It was bought by Foundation 9 Entertainment in March 2008 before Cavers, Porter, Mills and Chris Stockwell completed a management buyout of the studio in November 2014.

Sumo Group had its initial public offering on the London Stock Exchange's (LSE) AIM market later that month.

[13] Tencent's acquisition was approved by the Committee on Foreign Investment in the United States in December 2021, followed by the High Court of Justice on 13 January 2022.